#4978E1
Closest named color: Royal Blue (#4169E1). oklch(59.4% 0.168 263.9), rgb(73, 120, 225).
Aa
Black text reads best on this color (5.05:1).
About this color
#4978E1 is a medium-dark, vivid blue. In OKLCH its lightness is 59%, its chroma 0.168 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Royal Blue (#4169E1), ΔE 0.040 away. Black text reads best on it, at 5.05:1.
| Hue family | Blues |
| Lightness | medium-dark (59%) |
| Chroma | vivid (0.168) |
| Temperature | cool |
| Nearest name | Royal Blue (#4169E1) |
| Black text | 5.05:1 |
| White text | 4.15:1 |
Values
| HEX | #4978E1 |
| RGB | rgb(73, 120, 225) |
| HSL | hsl(221, 72%, 58%) |
| OKLCH | oklch(59.4% 0.168 263.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #4978E1 | 4.15:1 | AA large text | Lc -73.7 | Content text, not long reading |
| Black text on #4978E1 | 5.05:1 | AA | Lc 35.8 | Non-text elements, placeholder text |
| #4978E1 text on white | 4.15:1 | AA large text | Lc 68.2 | Content text, not long reading |
| #4978E1 text on black | 5.05:1 | AA | Lc -33.4 | Non-text elements, placeholder text |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 500.
-
Step 50
50
#F2F6FD
oklch(97.2% 0.01 261.8)
-
Step 100
100
#E2EAFA
oklch(93.6% 0.023 264.5)
-
Step 200
200
#CADAF8
oklch(88.6% 0.045 263.1)
-
Step 300
300
#A6C1F7
oklch(81% 0.082 264)
-
Step 400
400
#769EF2
oklch(70.6% 0.131 264)
-
Step 500
500 (this color)
#4978E1
oklch(59.4% 0.168 263.9)
-
Step 600
600
#396ADC
oklch(55.5% 0.183 263.9)
-
Step 700
700
#2C58BF
oklch(49.1% 0.169 263.8)
-
Step 800
800
#25499B
oklch(42.8% 0.14 263.7)
-
Step 900
900
#223E7B
oklch(37.8% 0.109 263.5)
-
Step 950
950
#142548
oklch(27.1% 0.069 263.1)
#4978E1 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #4184E5 | 0.031 |
| Deuteranopia (no green cones) | #2076DF | 0.031 |
| Tritanopia (no blue cones) | #0090A2 | 0.135 |
| Achromatopsia (no color) | #7C7C7C | 0.168 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4978E1
#4978E1
oklch(59.4% 0.168 263.9)
- #A07700
#A07700
oklch(59.4% 0.122 84.4)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #4978E1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Royal Blue #4169E1 ΔE 0.040
- Clear Blue #247AFD ΔE 0.047
- Cornflower #6A79F7 ΔE 0.051
- Cerulean Blue #056EEE ΔE 0.054
- Soft Blue #6488EA ΔE 0.055
- Windows Blue #3778BF ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.057
- Neon Blue #4361EE ΔE 0.062
Use #4978E1 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.